<form action="<?php echo url_for('domainCreateComment',array('uin' => $collection->getUin()))?>" method="post">
    <table>
        <?php echo $form ?>
        <tr>
            <td colspan="2">
                <input type="submit" name="postComment" id="postComment" value="Post Comment"/>
            </td>
        </tr>
    </table>
</form>